Type-writing machine.



F. W. BUFFUM & M. A. CULLING.

TYPE WRITING MACHINE. APPLICATION FILED JUNE 12, 19 15.

1,170,217. Patented Feb. 1, 1916.

flwi $15M); Q; I Wi /2:2 5 1% UNITED STATES PATENT OFFICE.

FRANK W. BUFFUM AND MEBBITT A. CULLING, OF LOUISIANA, MISSOURI, ASSIGNORS TO BUFFUH TOOL COMPANY, OF LOUISIANA, MISSOURI, A CORPORATION OF MIS- sotmr.

Original application filed September 21,1914, Serial No. 882,800. Divided and this 12, 1915. Seriaili'o. 83,762.

I To all whom it may concern:

Be it known that we, FRANK W. BUFFUM and MERRITT A. CULLING, citizens of the United States, residing in the city of Louisiana, county of Pike, and State of Missouri, have invented a certain new and useful Improvem'ent in Type-Writing Machines, of which the following is a full, clear, and exact description, such as will enable others skilled in the art towhich it appertains to make and use the same.

This invention relates to typewriting machines, and is a division of our pending application Serial No. 862,800, filed September 21,1914.

The main object of our invention is to provide a simple and efficient means for supporting a roll of carbon paper in operative position adjacent to the platen of the machlne.

Another object is to provide a support for a roll of carbon paper that can be quickly attached to or detached from the machine with which the support is used.

Another object is toprovide a support of the character described that can be rigidly connected to the machine without the use of bolts, rivets or similar fastening devices. And still another object is to provide a support of the character described in which a roll of carbon paper may be removed or placed in operative position without detaching the support from the machine.

Other objects and desirable features of our invention will be hereinafter pointed out.

Figure 1 of the drawings is an end elevational view, partly in vertical section of a typewriting machine provided with a carbon paper roll supporting device constructed in accordance with our invention. Fig. 2 is a longitudinal sectional view taken approximately on the line 2-2 of Fig. 1; and

Fig. 3 is a perspective view of the carbon roll spool and the supporting means therefor.

Referring to the drawings which illustrate the preferred form of our invention, A designatesa typewriting machine provided with a platen B and a cross rodor shaft 1 arranged in the rear of and parallel to said platen, said rod having a longitudinal groove 2 arranged on .the underside thereof.

The machine herein illustrated is a standard Underwood typewriter, but we wish it Specification of Letters Patent.

TYPE-WRITING MACHINE.

Patented Feb. 1, 1916.

application filed June to be understood that our invention is not limited to use with this particular type of machine, as it could be successfully applied to various types of machines. As in our pendmg application heretofore referred to, the machine A is equipped for making stenoils and the carbon paper 2 is adapted to partially surround the platen B of the machine and lie behind the stencil so that when the central field m of the stencil is struck by one of the type bars D, said carbon paper will'cause the impression on the stencil to be clearly outlined, thus enabling the operator to see whether or not the correct printing character has been struck. While our invention is well adapted for use with stencils, as above outlined, it is obvious that it is not limited to this particular use, as it could be just as successfully emploved in an ordinary typewriting machine for making copies of the matter that is being printed. The spool I for carrying the roll of carbon paper 2 is arranged on the carriage of the machine in such a manner that the carbon paper can be led downwardly underneath the platen, and thence upwardly around the front of the platen, as shown in Fig. 1, said spool being preferably formed oftwo telescoped tubes 3 and 4, each of which is provided at one end with an end flange 5, thus producing a spool that can be easily taken apart for the purpose of removing or inserting a roll of carbon paper.

.A standard 6 that is connected to the carriage of the machine is provided with a horizontally-disposed shaft or extension 7 on which the spool I is adapted to revolve, said spool being locked securely in operative position on said shaft by means of a resilient member 8 on one of the end flanges 5 that snaps into an annular groove 9 formed in the outer end portion of the shaft 7.

The shaft 7 is provided with a shoulder.

10 adjacent its inner end that limits the inward movement of the spool I on said shaft, and causes the groove 9 toline up accurately with the resilient member 8, thus being rigidly secured at one end to the end flange 5 and whose other end is slidably mounted between a pair of lugs 11.

The standard 6 can be connected to the carriage in various ways, and in the form of our invention herein shown, said standard is provided at its lower end with a hook 12 that partially surrounds the rod or shaft 1,

said hook being provided with a rib or lug- 13 that enters the groove 2 in the underside of said rod. A sleeve 14 that is -slidably mounted on said standard is provided with a. finger 15 that bears against one side of the cross rod 8 when the standard is in operative'position, as shown in Figs. 1 and 2.

' When the sleeve 14 is raised high enough to drawings the carry the finger 15 out of engagement with the rod 1 the standard 6 can be disconnected from said rod, but when said sleeve is moved downwardly into the position shown in the rod 1, and thus, not only locks the standard to said rod, but prevents the same from turning.

From the foregoing it will be seen that we have devised a spool for carbon paper rolls that can be quickly and-easily taken apart and assembled for the purpose of removing or inserting a roll of carbon paper, and a support for said spool that can be easily attached to the carriage of a typeangular extension that is detachably connected to said carriage, said extension being integral with said shaft.

2. In a typewriting machine,a carriage, and a horizontally-disposed shaft for rotatably supporting a spool that is adapted to contam a roll of carbon paper, said shaft having a single integral, downwardly-projecting extension at one end thereof that is detachably connected to said carriage.

3. In a typewrltlng machine, a carriage finger 15 tightly grips the provided with a crossbar having longitudinal groove therein, and a support for a roll of carbon paper, said support having a hook-shaped portion that cooperates with said grooved cross bar, and means for bold ing said hook-shaped portion in engagement with said cross bar.

4. In a typewriter, a carriage provided with a cross bar, and a substantially L- shaped member having one of its legs detachably connected to said bar and its other leg lying parallel to said cross bar and adapted to support a rotatable spool.

5. In a typewriter, a carriage, a horizontally-disposed stationary shaft detachably connected to said carriage, a spool loosely 'mounted on said shaft, a shoulder on said shaft that limits the movement of said spool in one direction longitudinally of said shaft, and cooperating means on said spool and said shaft for preventing longitudinal movement of said spool in the opposite direction.

6. An attachment for typewriting machines, comprising a spool for carrying a roll 'of carbon paper, a standard provided with a norizontallydisposed stationary shaft on which said spool is loosely mounted, a hook on the lower end of said standard that is adapted to partially surround a cross rod on the carriage of the machine, and a slidable sleeve on said standard provided with a finger piece that engages said rod and thus prevents the standard from turn- 7. An attachment for typewriting machines, comprising a spool composed of two telescoped, tubular-shaped members provided with end flanges, a supporting shaft on which said spool is rotatably mounted, and a resilient device on one of said end flanges that enters an annular groove in said shaft and thus holds said spool in operative position. In testimony whereof, we hereunto aflix our signatures in the resence of two witnesses, this 9th day of une, 1915.

FRANK W. BUFFUM. MERRITT A. CULLING.

Witnesses:

THOMAS J. STREGK,

ETHELYN TINsLEY. 

